1. John Stough Bobbs;Ellis,1994
2. Carl Langenbuch;Ellis,1994
3. Carl Langenbuch and the first cholecystectomy;Traverso;Am J Surg,1975
4. Carl Langenbuch and the first cholecystectomy;Chauvin;Am Surg,1995
5. Erich Mühe and the rejection of laparoscopic cholecystectomy (1985): a surgeon ahead of his time;Litynski;JSLS,1998